package com.song.cloud.service;

import com.song.cloud.pojo.Book;

import java.util.List;

/**
 * @Author 宋伟宁
 * @Date 2024/1/2
 * @Version 1.0
 **/
public interface BookService {
     List<Book> findAll();

     Book findById(Integer id);
     void save(Book book);

     void update(Book book);

     void delete(Integer id);

}
